/************************************************************************
Copyright 2003, 2004, 2005, 2006, 2007, 2008 Grid Technology Research Center,
National Institute of Advanced Industrial Science and Technology.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
************************************************************************/

package jp.aist.gtrc.plus.scheduler;

import jp.aist.gtrc.plus.scheduler.status.MainServer;
import jp.aist.gtrc.plus.reserve.ReserveId;


public class ScheduleOrder {

	private MainServer mainSrv;
	private final ReserveId rsvId;

	public ScheduleOrder() {

		this(null, null);

	}

	public ScheduleOrder(MainServer mainSrv) {

		this(mainSrv, null);

	}

	protected ScheduleOrder(MainServer mainSrv, ReserveId rsvId) {

		this.mainSrv = mainSrv;
		this.rsvId = rsvId;

	}

	void setMainServer(MainServer srv) {

		assert(this.mainSrv == null);
		assert(srv != null);
		this.mainSrv = srv;

	}

	void markAsDone() {

		/*
		 * NOTE: We use one SchedulerOrder instance repeatedly.
		 * So we must clear mainSrv, it's disconnected at each time.
		 * See ScheduleStarter#makePeriodicalScheduleOrder() etc.
		 */
		this.mainSrv = null;

	}

	public MainServer getMainServer() {

		return mainSrv;

	}

	public ReserveId getReserveId() {

		return rsvId;

	}

	public boolean equals(Object o) {

		if (o instanceof ScheduleOrder) {
			ScheduleOrder order = (ScheduleOrder)o;
			if (order.getMainServer() != this.getMainServer()) {
				return false;
			}
			if (rsvId == null) {
				return (order.getReserveId() == null);
			} else {
				return rsvId.equals(order.getReserveId());
			}
		}

		return false;

	}

	public int hashCode() {

		return super.hashCode();

	}

	public boolean toBeQuit() {

		return false;

	}

	public static final ScheduleOrder getStopOrderInstance() {

		return new ScheduleOrder() {
			public final boolean toBeQuit() {
				return true;
			}
		};

	}

}
